Home › Entities › general › classical modal logic

classical modal logic

modal logic containing the duality axiom schema ◊A↔¬◻¬A as well as the deduction rule A↔B ⊢ ◻A↔◻B
Thing general Q5128344
Press Enter · cited answer in seconds

classical modal logic

Summary

classical modal logic ranks in the top 2% of general entities by monthly Wikipedia readership (3 views/month).[1]

Key Facts

  • classical modal logic's subclass of is recorded as modal logic[2].
  • classical modal logic's Freebase ID is recorded as /m/03gx4pd[3].
  • classical modal logic's defining formula is recorded as \begin{aligned}&\Diamond A\leftrightarrow\lnot\Box\lnot A\&A\leftrightarrow B\vdash\Box A\leftrightarrow \Box B\end{aligned}[4].
  • classical modal logic's maintained by WikiProject is recorded as WikiProject Mathematics[5].
  • classical modal logic's Microsoft Academic ID is recorded as 2777241268[6].

Why It Matters

classical modal logic ranks in the top 2% of general entities by monthly Wikipedia readership (3 views/month).[1] It has Wikipedia articles in 5 language editions, a strong signal of global cultural recognition.[7]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . wikidata.org.

Aggregate / graph-position facts

  1. [1] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [7] ↑ . Wikidata sitelinks. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). classical modal logic. Retrieved April 10, 2026, from https://4ort.xyz/entity/classical-modal-logic
MLA “classical modal logic.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/classical-modal-logic.
BibTeX @misc{4ortxyz_classical-modal-logic_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{classical modal logic}}, year = {2026}, url = {https://4ort.xyz/entity/classical-modal-logic}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): classical modal logic — https://4ort.xyz/entity/classical-modal-logic (retrieved 2026-04-10)

Canonical URL: https://4ort.xyz/entity/classical-modal-logic · Last refreshed: